# Medium Voltage Calculations — Medium voltage installations

> Electrical installation calculation tool for medium voltage systems. (iPhone/iPad app by Angel Martinez.)

- Source: https://appshunter.io/ios/app/medium-voltage-calculations/id1559657607 (this page in markdown: same URL + `.md`)
- Developer: [Angel Martinez](https://appshunter.io/developer/1446956865)
- Category: Productivity, Utilities
- Price: Free with in-app purchases
- Rating: 5.00/5 from 1 App Store ratings
- Age rating: 4+
- Requires: iOS 16.0 · 21 MB
- Languages: American English, French (France), Italian, European Portuguese, European Spanish
- Released: 2022-05-21
- Data updated: 2026-06-19
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/medium-voltage-calculations/id1559657607/reviews.md

## What is Medium Voltage Calculations?

The most complete tool to support the calculation of high voltage electrical installations.

Free sections:
- Determination of the characteristics of the equipment: rated voltage (Ur), withstand at industrial frequency (Ud), withstand type of lightning (Up), short-term current (Ik)
- Sizing of low and medium voltage insulated cables (≤ 30 kV)
- Calculation criteria for admissible current, voltage drop, short circuit and protection, consideration of different factors for reducing the admissible current: temperature, thermal resistivity of the ground, grouping, sun exposure, etc.
- Multiple installation methods: tray, buried, under pipe, in the air ...
- Visualization of protection relay trip curve and MV cable admissible current
- Protection with transformer limiting fuses
- Earth fault current calculation (isolated neutral and earth)
- PE conductor
- Transformer performance and voltage drop
- Primary/secondary conversions in voltage and current transformers
- Secondary voltage of a transformer acoording to switch position
- Calculation of the transformation center ventilation needs
- Five safety rules
- Consult ANSI codes electrical protections
- Tray sizing
- Representation of 1 IEC curve
- Parameter configuration
  Voltages, frequency, conductivity of the conductor material, temperature
  MV specific: list type, cable bundle (flat / staggered)
  Regulation of LV protections
- Possibility of sharing results

Purchases In-App:
- Calculation of short circuits and impedances with the maximum and minimum values, type diagram with the following configuration: Network, Transformer, MV line, LV line
- Selection of voltage and current transformers (protection and measurement), capacitor bank of the transformer, calculation of the number of insulators
- Protection and adjustment of the transformer overcurrent relay, selectivity with low voltage switch (Ir, Isd, Ii), graph of the actuation curves and identification of characteristic points
- Calculation of medium voltage line (short line model, single circuit) with conductors: AL1 / ST1A (LA), AL1 / S20SA (LARL), AL3 / ST1A (DA), AL3 (D)
- Dimensioning and checking of protective and service grounding installation, system configuration, calculation of Howe parameters, step and contact voltages, distance between grounding, single grounding, additional safety measures and results checking
- Representation of up to 3 IEC curves with different voltage levels
- Removal of ads with any purchase made

IN NO CASE SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT OR INDIRECT DAMAGES AS A RESULT OF THE CORRECT OR INCORRECT USE OF THE APPLICATION














Attribution icon:
Icons made by smalllikeart from www.flaticon.com

## Key features

- Equipment characteristic determination
- Cable sizing (low and medium voltage)
- Admissible current and voltage drop calculations
- Short circuit and protection analysis
- Earth fault current calculation
- Transformer performance and ventilation
- Protection relay trip curve visualization

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Overhead line | $1.99 | one-time |
| Impedances and shor-circuits | $1.99 | one-time |
| Selection of equipment | $1.99 | one-time |
| Transformer overcurrent | $2.99 | one-time |
| Earthing installation | $2.99 | one-time |
| Protection relays curves | $1.99 | one-time |
| Pro version (full) | $6.99 | one-time |



## Frequently asked questions about Medium Voltage Calculations

### What electrical calculations can Medium Voltage Calculations perform?

Medium Voltage Calculations supports a wide range of calculations including equipment characteristics, cable sizing, voltage drop, short circuits, earth fault currents, and transformer performance. It also visualizes protection relay trip curves and MV cable admissible currents.

### Are there any advanced features available in Medium Voltage Calculations?

Yes, advanced features like calculation of short circuits and impedances with maximum/minimum values, selection of voltage and current transformers, and detailed grounding installation analysis are available via in-app purchases.

### How does Medium Voltage Calculations handle ads?

This application does not contain advertisements. Any purchase made within the app will also ensure the removal of ads, though the app is already ad-free.

### What platforms is Medium Voltage Calculations compatible with?

Medium Voltage Calculations is available for iPhone and iPad devices.

### How often is Medium Voltage Calculations updated?

The latest version is 1.6.0, last updated on January 11, 2026. While this date is in the future, indicating potential for ongoing development, users can expect regular updates based on the developer's release history.

### What is the user sentiment for Medium Voltage Calculations?

Based on the provided data, the app has a rating of 5.0 stars from 1 rating, indicating a highly positive initial user reception.

### Can I share my calculation results from Medium Voltage Calculations?

Yes, the application provides the possibility of sharing your calculation results, which is a useful feature for collaboration and documentation.

### What is the age rating for Medium Voltage Calculations?

Medium Voltage Calculations has an age rating of 4+, making it suitable for a wide audience.

## Version history (last 5 releases)

### 1.6.0 — 2026-01-11

* Minor fixes

### 1.5.4 — 2025-07-07

* Minor fixes

### 1.5.3 — 2025-03-28

* Minor fixes

### 1.5.2 — 2025-02-04

* Minor fixes

### 1.5.0 — 2024-08-23

* Minor fixes

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## More apps by Angel Martinez

- [InstElectric - Electricity](https://appshunter.io/ios/app/instelectric-electricity/id1447422315)
- [InstElectric Pro - Electricity](https://appshunter.io/ios/app/instelectric-pro-electricity/id1447888290)
- [Calculation of lighting](https://appshunter.io/ios/app/calculation-of-lighting/id1448345451)
- [Calculation of lighting Pro](https://appshunter.io/ios/app/calculation-of-lighting-pro/id1448371674)
- [Photovoltaic solar panel](https://appshunter.io/ios/app/photovoltaic-solar-panel/id1481439671)
- [SLD \| Electrical diagrams](https://appshunter.io/ios/app/sld-electrical-diagrams/id1534899128)

All apps by Angel Martinez: https://appshunter.io/developer/1446956865

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-19.*